Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films

材料科学技术（英文）, 2011, 27(5): 398-402.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

2.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

3.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

4.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

5.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

6.Department of Material Science & Engineering, Akita University, Akita 0108502, Japan

基金项目: This work was supported by the Program for New Century Excellent Talents in University(NCET-09-0272) One of authors,B.Yang appreciates Northeastern University Research Foundation for Excellent Doctor Candidates(200904) the Liaoning Program for Excellent Talents in University(2009R23)

Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films

Bo Yang ^1, , Gaowu Qin ^2, , Wenli Pei ^3, , Song Li ^4, , Yuping Ren ^5, , Shunji Ishio ^6,

1.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

2.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

3.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

4.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

5.Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China

6.Department of Material Science & Engineering, Akita University, Akita 0108502, Japan

Keywords： Intergranular exchange coupling

In this paper, ternary Co-Pt-P thin films were prepared by magnetron sputtering; with platinum and home-made Co-P chips pasted on the cobalt target. The structure and magnetic properties were investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM), respectively. With increasing phosphor content,the coercivities of Co-12 at.% Pt-P films increase from 1034 to 1525 Oe owing to the exchange decoupling among magnetic grains. The decrease of inter-granular exchange coupling was confirmed by delta-M curve measurement and magnetic force microscopy (MFM). Transmission electronic microscopy (TEM) with nanobeam composition analysis shows that phosphor segregated at cobalt-based grain boundaries is responsible for the exchange decoupling. It is thus suggested that the phosphor addition is effective to tune the exchange coupling of magnetic grains, particularly for perpendicular recording media.

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Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films

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